R3166-R3206-HP High-End Firewalls Network Management Configuration Guide-6PW101

433
PIM configruation
Protocol Independent Multicast (PIM) provides IP multicast forwarding by leveraging unicast static routes
or unicast routing tables generated by any unicast routing protocol, such as routing information protocol
(RIP), open shortest path first (OSPF), intermediate system to intermediate system (IS-IS), or border
gateway protocol (BGP). Independent of the unicast routing protocols running on the device, multicast
routing can be implemented as long as the corresponding multicast routing entries are created through
unicast routes. PIM uses the reverse path forwarding (RPF) mechanism to implement multicast forwarding.
When a multicast packet arrives on an interface of the device, it undergoes an RPF check. If the RPF check
succeeds, the device creates the corresponding routing entry and forwards the packet. If the RPF check
fails, the device discards the packet. For more information about RPF, see “Multicast routing
c
onfiguration.”
Based on the implementation mechanism, PIM falls into two modes:
• Protocol Independent Multicast–Dense Mode (PIM-DM), and
• Protocol Independent Multicast–Sparse Mode (PIM-SM).
Configuring PIM in the web interface
Configuration prerequisites
Before configuring PIM, you need to configure a unicast routing protocol so that all devices in the domain
are interoperable at the network layer.
Configuration overview
Configuring PIM-DM
Table 77 PIM-DM configuration task list
Task Remarks
Globally enabling multicast
routing
Required
Globally enable multicast routing after selecting Network > Routing
Management > Multicast Routing. For more information, see “Multicast
routing configuration.”
Configuring PIM interfaces
Required
Enable PIM-DM on an interface.
By default, PIM is disabled on an interface.
Displaying PIM neighbor
information
Optional